Instrument fob ascertaining the point of becalescence of steel



J. B. ROBINSON. INSTRUMENT FOR ASCERTAINING THE POINT OF RECALESCENCE OF STEEL.

APPLICATION FILED JAN- I6. I919.

Patented July 22', 1919 IN V EN TOR.

A TTORNEYS.

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PANT Flt),

JOSEPH B. ROBINSON, OF ROCHESTER, NEW YORK, ASSIGNOR F ONE- HALF TO CARL M. WEBER, OF ROCHESTER, NEW YORK.

INSTRUMENT FOR ASCERTAINING THE POINT OF RECALESCENCE OF STEEL.

Application filed January 16, 1919.

. To all whom it may concern:

Be it known that I. JOSEPH B. ROBINSON,

a citizen of the United States, and resident of Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Instruments for Ascertaining the Point of Recalescence of Steel, of which the following is a specification. I

The present invention relates to an instrument forascertaining the point of recalescence of steel and more particularly to the type having a magnet mounted u on a non-magnetic support, the magnet eing presented to the steel while the latter is in a heated state to determine whether the point of recalescence has been-reached.

An object vof this invention is to provide in connection with the magnet an abutment which will permit the movement of the magnet on its support should the point of recalescence not be reached, but will prevent the movement of the magnet should the point of recalescence be reached, the magnet normally lying in cooperation with the abutment.

To this and other ends, the invention consists of certain arrangements of parts which will be hereinafter described, the novel fea tures being pointed out in the appended claimsi d In the drawings: d l Figure 1 isa side view of the instrument showing the magnet in cooperation with the abutment; v

Fig. 2 is a similar View partially in section showing the magnet moving away from the abutment under the action of the steel which has not reached the point of recalescence;

Fig. 3 is a transverse enlargedsection on the line 33, Fig. 1; r

Fig.- 4c is a view on a reduced scale showing theposition of the magnet when the latter engages steel which has reached the point of recalescence; and I Fig. 5 is a detail view of the magnet showing the brass bearing. 7

Referring more particularly to the drawingfs, 1 indicates a supporting member which, in .this instance, comprises a tubular bar made of brass or other suitable non-magnetic material, its tubular. form being to prevent its becoming heated throughout its Specification of Letters Patent.

Serial No. 271,535.

5 on which the magnet 6 is mounted to turn,

the magnet in this instance having between its ends a transversely extending bearing piece 7 formed of brass or a nonmagnetic material and having its ends formed with sockets 8 into which the pintles 5 project.

In this instance the magnet 6 is elongated and the pivot is arranged slightly to one side of the center so that the weighted end tends to move into cooperation with an abutment 9 preferably formed by turning inwardly, a portion of an arm 10 extending from the support 1 to one side of the magnet, said arm also being formed of non-magnetic material such as brass.

In the use of the instrument, the latter is introduced through the door 11 of the furnace to engage with the steel 12, its outer or lighter end being pressed against the steel, thus holding the weighted end firmly in en- .gagement with the abutment 9. Should the steel not have reached the point of reca-- lescence, the magnet-Will be held by the steel when the support is withdrawn and the weighted end of the magnet will be carried away from the abutment 9 thus indicating to the user that the oint of recalescence has not been reached. hould the point of recalescence have been reached,.the magnet will not be affected by the steel, but will be pressed firmly against the abutment 9,

It is apparent that the invention is not limited to the construction herein shown. I believe myself to be thefirst to provide a magnet which lies in engagement with a fixed abutment and which when pressed to, the steel, if the point of recalescence has been Patented July 22, 1919. r

What I claim as my invention and desire to secure by Letters Patent is 1. An instrument of the class described comprising a support, a magnet movably mounted thereon, and an abutment with which said magnet cooperates and from which it moves under the action of steel which has not reached the point of recalescence.

2. An instrument of the class described comprising a support, an abutment thereon, and a movably mounted magnet having a norm-a1 tendency to move toward the abutment and to be moved away from the abutthe abutment, and adapted to be moved away from said abutment by steel which has not reached the point of recalescence.

4. An instrument of the class described comprising a support, an abutment thereon,

and a pivotally mounted magnet having a portion on one side of its pivot heavier than on the other side to hold said magnet into cooperation with the abutment from which said magnet is moved by steel which has not reached the point of recalescence.

5-. An instrument of the class described, comprising a tubular support, arms depending from said support, a magnet pivoted between the arms and havlng a greater weight 1 on the inner arm thereof than the outer arm, and an abutment against which the magnet is held by the heavier arm of the magnet.

JOSEPH B. ROBINSON 

